Description
BAC200K750
/ BAC150K350
High-Frequency Isolated Grid-Connected & Off-Grid Energy Storage PCS
High-Frequency Isolation · Modular Design · V2G / V2L Ready
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✓ IP20
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✓ Hot-Swap
This modular energy storage converter is meticulously built upon V2G high-frequency isolation modules, perfectly combining the dual advantages of high-frequency isolation and modularity. The cabinet is compatible with IBG75027 and IBG30050 modules, allowing flexible configuration into energy storage converters of different power levels and battery voltages according to specific requirements.
When paired with an STS (Static Transfer Switch), seamless switching between grid-connected and off-grid modes can be achieved, ensuring uninterrupted power supply to critical loads. The entire power loop features independent anti-interference design, ensuring stable operation in complex industrial electromagnetic environments.
This grid-connected/off-grid energy storage converter is widely applied in medium-power scenarios such as microgrids, areas with frequent power outages or weak grids, and user-side energy storage.
⚙️ Core Functions & Product Advantages
Superior Safety & Reliability
Full High-Frequency Isolation: Ensures a reliable safety barrier between batteries and the grid/load. Battery-Friendly: Grouped battery connection reduces series/parallel connections, prevents circulation issues, and extends battery life. Wide Compatibility: DC side accommodates battery groups from different manufacturers. Independent anti-interference loop design adapts to complex electromagnetic environments.
High-Efficiency Energy Conversion
High-frequency isolation between battery and grid eliminates the need for a bulky line-frequency transformer, delivering efficiency up to over 95% with SiC devices. Significantly reduces long-term operational energy loss and electricity costs.
Smart & User-Friendly Experience
Seamless Switching: With STS module, seamless grid/off-grid transitions ensure uninterrupted power. Wide Voltage Range: Covers 100V–750Vdc for passenger vehicles, perfectly适配 echelon batteries.
Significant Cost Advantage
High-frequency isolation eliminates the line-frequency isolation transformer and indirect costs (cabinets, fans), substantially reducing system procurement and integration costs.
Flexible & Convenient Configuration
19″ Rack Mount: Compact structure saves space. Hot-Swappable: Modules enable flexible configuration and maintenance. Customizable: Flexibly configure different power and voltage levels.
🏭 Typical Applications
Battery Echelon Utilization
Ideal for repurposing retired EV batteries for energy storage. Power range covers 15kW–200kW, perfect for industrial and commercial parks.
Industrial & Commercial Peak Shaving
Peak shaving and valley filling energy storage for industrial parks and commercial buildings.
Island / Remote Microgrids
Independent microgrids for islands, remote villages, and areas with weak grid infrastructure.
Weak Grid User-Side Storage
User-side energy storage systems in areas with frequent power outages or unstable grids.
Mobile Temporary Power
Mobile energy storage for major events (G20, Boao Forum, college entrance exams) and temporary power needs.
Integrated Storage Cabinets
Embedded PCS solution for system integrators to design various forms of integrated energy storage systems.
⚡ Electrical Topology & Working Mode
BAC200K750 / BAC150K350 adopts a high-frequency isolated bidirectional AC/DC topology, supporting three operating modes: grid-connected charging, grid-connected V2G discharging, and off-grid V2L independent power supply. High and low voltage are completely isolated with full-loop independent anti-interference for controlled bidirectional energy flow.
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HF Isolated AC/DC PCS
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STS Switch
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Battery 100‑750Vdc
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⚡ V2G Grid Discharging
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🏝️ V2L Off-Grid Mode
🛡️ Protection & Safety System
BAC200K750 / BAC150K350 features a hardware ultra-fast protection circuit + full digital DSP real-time monitoring dual-protection architecture. Power and communication loops are independently designed against interference, with microsecond-level fault shutdown to comprehensively protect the grid, echelon batteries, and equipment.
Hardware-level overvoltage, overcurrent, and short-circuit protection. Real-time monitoring with instant power device shutdown to prevent battery overcharge/discharge and component failure.
Full-link high-frequency isolation completely separates high-voltage grid from low-voltage battery clusters, eliminating insulation breakdown and leakage risks — enhancing overall safety for echelon storage systems.
Built-in anti-islanding logic. Intelligent forced-air cooling with automatic linear derating above 55°C; stable startup down to -30°C.
Independent battery group access with per-group optimization. Hardware-level circulation prevention extends echelon battery lifespan and overall system longevity.
❓ Frequently Asked Questions
🔋 What battery voltage ranges do the two models support?
BAC200K750 supports 200–750Vdc high-voltage echelon battery clusters; BAC150K350 supports 100–300Vdc low-voltage echelon battery groups. Both models can be used independently or mixed in the same cabinet for flexible power combinations.
⚡ What is the core advantage of high-frequency isolation vs. traditional line-frequency isolation?
Eliminates bulky line-frequency transformers — significantly reducing size, weight, and cost. SiC version achieves >95% peak efficiency with lower operational losses. Supports independent battery group control, suppressing circulation — making it ideal for retired echelon batteries with inconsistent performance.
🔄 How is seamless grid-to-off-grid switching achieved? What accessories are needed?
Requires the STS Static Transfer Switch module. During normal grid operation it runs in grid-connected peak-shaving mode; upon grid failure it automatically switches to V2L off-grid mode, providing uninterrupted power to local loads with no blackout.
🔗 Does the module support hot-swappable parallel expansion?
Yes. Supports 19″ standard rack mounting with hot-swappable modules. Multi-module parallel operation with stable current sharing. Single module failure can be replaced online without system shutdown, minimizing maintenance downtime.
🧩 Does the module support custom development? What is the sample policy?
Supports custom adjustments for battery voltage, power, communication protocols, and cooling solutions. Complete technical documentation (spec sheets, communication protocols, topology drawings) available. Samples available upon request.
🔗 Related Products
— 20kW / 15kW V2G Bidirectional Power Modules
— 20–60kW Seamless Grid/Off-Grid Switching
— High-Power STS for Large-Scale Storage
— 66kW / 1000V SiC MPPT with 99% Efficiency
— Complete Integrated Storage System Solutions
— Complete Mobile Energy Storage Converter Systems
